From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A0B2C352AA for ; Mon, 30 May 2022 14:47:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242660AbiE3Oqf (ORCPT ); Mon, 30 May 2022 10:46:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240269AbiE3OZL (ORCPT ); Mon, 30 May 2022 10:25:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C2460A88A0; Mon, 30 May 2022 06:50:53 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id DF38960F22; Mon, 30 May 2022 13:50:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20B50C341C5; Mon, 30 May 2022 13:50:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1653918610; bh=NhQIeyPX25gsV3OUwC5lhjgviB0f5JW/jJAS23Jt5uw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Ng0Sr++9zWzu9kmLIKsFCL3EQQ/QXRE4HdWCpIO6PztAs6hSgTdaHx4wD40hj514d VtTBy2FkmKYinKliE0YQr0cz0zcKJzLRblU6Wq9IhqB1XPehP7irP3t7/ebgAhmpzT BtEt9Ux72pyc08LGF5ASFEk0MY3ks1AQDvI0Fzn1luRB+atbS+qo433kCIzzdSM70z lva+B1qraVL+vH7fY4p6EkOV0IoggevRMYX6q4NQZSEEo6BbGidQvCwtYbVJSc/xUF dD51tEOzX7oAa0F8klW7ZkJ4QJo/SVuxbjsc2h9Pe2m7IW3nWq4L5zBzJDgvO0yMgH 40ZegXMaI2vIw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Steven Price , Liviu Dudau , Sasha Levin , maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, airlied@linux.ie, daniel@ffwll.ch, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 4.19 18/38] drm/plane: Move range check for format_count earlier Date: Mon, 30 May 2022 09:49:04 -0400 Message-Id: <20220530134924.1936816-18-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220530134924.1936816-1-sashal@kernel.org> References: <20220530134924.1936816-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steven Price [ Upstream commit 4b674dd69701c2e22e8e7770c1706a69f3b17269 ] While the check for format_count > 64 in __drm_universal_plane_init() shouldn't be hit (it's a WARN_ON), in its current position it will then leak the plane->format_types array and fail to call drm_mode_object_unregister() leaking the modeset identifier. Move it to the start of the function to avoid allocating those resources in the first place. Signed-off-by: Steven Price Signed-off-by: Liviu Dudau Link: https://lore.kernel.org/dri-devel/20211203102815.38624-1-steven.price@arm.com/ Signed-off-by: Sasha Levin --- drivers/gpu/drm/drm_plane.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 2411b6de055e..425e76e39b3b 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -177,6 +177,13 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, if (WARN_ON(config->num_total_plane >= 32)) return -EINVAL; + /* + * First driver to need more than 64 formats needs to fix this. Each + * format is encoded as a bit and the current code only supports a u64. + */ + if (WARN_ON(format_count > 64)) + return -EINVAL; + WARN_ON(drm_drv_uses_atomic_modeset(dev) && (!funcs->atomic_destroy_state || !funcs->atomic_duplicate_state)); @@ -198,13 +205,6 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, return -ENOMEM; } - /* - * First driver to need more than 64 formats needs to fix this. Each - * format is encoded as a bit and the current code only supports a u64. - */ - if (WARN_ON(format_count > 64)) - return -EINVAL; - if (format_modifiers) { const uint64_t *temp_modifiers = format_modifiers; while (*temp_modifiers++ != DRM_FORMAT_MOD_INVALID) -- 2.35.1